EP2223621A1 - Embout de protection pour chaussure industrielle - Google Patents

Embout de protection pour chaussure industrielle Download PDF

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Publication number
EP2223621A1
EP2223621A1 EP08766689A EP08766689A EP2223621A1 EP 2223621 A1 EP2223621 A1 EP 2223621A1 EP 08766689 A EP08766689 A EP 08766689A EP 08766689 A EP08766689 A EP 08766689A EP 2223621 A1 EP2223621 A1 EP 2223621A1
Authority
EP
European Patent Office
Prior art keywords
toe cap
toes
foot
last
protection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08766689A
Other languages
German (de)
English (en)
Other versions
EP2223621A4 (fr
EP2223621B1 (fr
Inventor
Roberto MUÑOZ ALMAGUER
Fernando Chico Ruiz
Carlos Armando Fuentes Aragon
Roberto Zitzumbo Guzman
Ramón Alberto AYALA MEDINA
Constantino Vidal Guerrero
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Internacional De Calzado Ten Pac SA de CV
Original Assignee
Internacional De Calzado Ten Pac SA de CV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Internacional De Calzado Ten Pac SA de CV filed Critical Internacional De Calzado Ten Pac SA de CV
Publication of EP2223621A1 publication Critical patent/EP2223621A1/fr
Publication of EP2223621A4 publication Critical patent/EP2223621A4/fr
Application granted granted Critical
Publication of EP2223621B1 publication Critical patent/EP2223621B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A43B7/32—Footwear with health or hygienic arrangements with shock-absorbing means
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/08—Heel stiffeners; Toe stiffeners
    • A43B23/081—Toe stiffeners
    • A43B23/082—Toe stiffeners made of metal
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/08—Heel stiffeners; Toe stiffeners
    • A43B23/081—Toe stiffeners
    • A43B23/086—Toe stiffeners made of impregnated fabrics, plastics or the like
    • A43B23/087—Toe stiffeners made of impregnated fabrics, plastics or the like made of plastics
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D1/00—Foot or last measuring devices; Measuring devices for shoe parts
    • A43D1/08—Measuring devices for shoe parts

Definitions

  • a one-piece toe cap has been designed for industrial protective footwear in which said toe cap is specifically designed to the protection of the five digits of the foot against impact and crushing by falling objects.
  • the invention relates to a one-piece toe cap for safety footwear that forms a concave 180° frame that houses an internal cavity supported by a horizontal interior flange that covers the entire internal part of the perimeter of the toe cap 5 to 7 mm in width, the concave frame is composed of a front wall with side walls connected to both sides and whose upper edges are joined by a concave surface following the profile of the last; the toe cap is previously prepared by the attachment in its mouth of a strip of synthetic material known as a tab and placed in the footwear through an insertion fitted to the tip of the dressed last, meaning by dressed last the prior attachment of an element known as the sole to the bottom part of the last and another element fitted three-dimensionally to the tip of the last known as the lining, the attachment of the toe cap being completed by a layer of material encircling the entire outer surface of the toe cap.
  • the upper surface has an edge on the side opposite the front wall having a recess.
  • the invention relates to a method of calculating and designing a
  • Mexican utility model No. 796 granted on 13 July 2000 to the company Calzado Van Vien S.A. de C.V., relates to an armored tip for protective footwear, formed by a section in the shape of a hollow semiparabolic arch of high-strength steel sheet, intended to house and protect the tip of the user's foot from forceful impacts, wherein the section itself is folded at its lower end to form a horizontal flange that spans the entire perimeter by the internal part of the tip, and the ends of the inner horizontal flange have a bridge welded to the lower face of the flange, whose purpose is to provide structural support to the armored tip, to prevent its collapsing or flattening under the impact of a force of significant magnitude.
  • the footwear includes an upper that has a front lining with a tip part arranged along an internal surface of the upper.
  • a relatively rigid front insole part is joined to an inner lining, the length of the front part of the insole being less than the length of the inner lining.
  • the tip portion of the front lining is then sewn to a peripheral edge of the front insole part, the front lining and the front insole part defining a cavity to receive part of the user's foot.
  • a steel tip is then placed basically around the tip part of the front lining.
  • Spanish utility model No. 1062608 relates to an ergonomical shoe, of the kind incorporating between the leather and the lining, and in the area of the toe and the heel, a rigid front reinforcement and a rear heel reinforcement, which participate both in the armoring of the leather and in the protection of the front foot from outside impacts, characterized in that it incorporates shock absorbing elements in the area of the front and rear reinforcements, adapted to the internal face of the front and rear reinforcement and situated, the same as these, between the leather and the lining, said shock absorbing elements being made of a soft, high-density material, such as a foam of urethane, polyurethane, polyethylene, EVA, latex, silicone or another similar material with adequate density and breathability for the type of footwear.
  • a soft, high-density material such as a foam of urethane, polyurethane, polyethylene, EVA, latex, silicone or another similar material with adequate density and breathability for the type of footwear.
  • Spanish utility model No. 1062609 relates to an ergonomical footwear, of the type having between its leather and its lining, and in the area of the tip or toe cap and the heel, a rigid front reinforcement and a rear reinforcement, which participate both in the armoring of the leather and in the protection of the front foot from outside impacts, characterized in that each of these front and rear reinforcement elements has two layers of different density, specifically, an outer layer of very high density, imparting hardness and rigidity to same, and an inner layer of less density, which is softer and more comfortable and which is what will make contact with the foot via the lining of the footwear.
  • Spanish utility model No. 1065081 describes a reinforcement tip for safety footwear that has an arched configuration that is designed for mounting on the front part of a safety footwear used in certain industries, characterized in that it is comprised of two parts or pieces (1) and (2), the first being rigid, of arched configuration, while the second part or piece (2) is of flexible material, and is joined by injection molding to the rear part of the rigid piece (1), forming a continuity with the latter.
  • Spanish utility model No. 2105370 describes a tip for a safety shoe or boot, to provide a tip which is light and has sufficient strength the tip is made of a compound material comprising a thermoplastic resin (7) reinforced with fiber and at least one wire mesh (4) that has a size of 7 to 200 reticules and is included in the fiber-reinforced thermoplastic resin.
  • the fiber-reinforced thermoplastic resin comprises a thermoplastic layer (1) reinforced with long fiber and it has long reinforcement fibers (5) incorporated in it, and a thermoplastic layer (2) reinforced with short fiber that has short reinforcement fibers (6) incorporated in it, and the wire mesh (4) is included in the thermoplastic layer (2) reinforced with short fiber.
  • the aforementioned developments describe the use of a bridge that serves basically to anchor the toe cap properly to the construction system; this bridge does not exist in the present invention.
  • the dimensions are not the same (width, height and internal depth).
  • the dimensions of the toe cap of the invention are adapted to the morphology of the worker's foot, and adequate construction materials have been included so as not to take up space from the toe cap which has the necessary space dictated by the dimensions of the foot, considering the movements for the various activities of the user during the performance of his activity.
  • the toe cap of the invention has a recess in the contour or edge of the flange, designed to accommodate a tab and create comfort, as well as improve the appearance of the footwear, and the disclosure of these documents does not show this.
  • the design of the invention withstands impact testing of approximately 101.7 to 146.7 Joules (10.40 to 14.95 kgf - m) and compression of 11,130 to 14,710 Newtons (1135 to 1500 kgf - m), leaving a free height of approximately 11.0 mm to 14.0 mm, in the finished shoe and not only at the point of the toe cap.
  • the invention relates to a one-piece toe cap for safety and protection footwear, formed by a front wall with lateral walls connected to both sides and whose upper edges are joined to a concave surface and in which the lower edges are provided with a flange providing it with rigidity, anchoring, stability and a base which further minimizes the movement of the toe cap and its sinking into the surface of the sole upon sustaining an impact or compression and at the same time serving to join the toe cap to the sole.
  • the safety footwear that is worn during work has a toe cap to prevent injury to the front part of the foot, by covering its five toes, from forces of sudden action, such as falling objects.
  • the prior art was researched, without result, for a toe cap that provides coverage and protection to the five toes and that is stable, light, comfortable, and prevents injury to the five toes under a maximum impact, and is easy to manufacture.
  • This need is only met by the toe cap of the present invention, which is made from a single piece, whose material provides resistance to impact and is stable and light. Its design incorporates a broadened end part and an edge in the lower zone, as termination of the front and lateral walls, at the same time providing rigidity to the terminal angle.
  • the toe cap is of a single piece, without any perforation for means of attachment, with lateral walls and continuous sheet, with a space arrangement sufficient to properly accommodate the five toes and at the same time allow them to flex freely, providing a comfort not offered by the toe caps on the market.
  • this toe cap is finished in keen edges forming a framework of original design, rigid and resistant to impact forces.
  • Another advantage is that, being made of a single piece, it facilitates the placement of the out covering material, which can be leather, synthetic, or textile, improving the final appearance of the footwear.
  • toe cap can be fabricated in a single step, and when produced on an industrial scale it provides major economic, technical, protective and hygienic advantages.
  • Yet another advantage is that it does not need grooves or bars connected in articulated fashion to secure the toe cap to the bottom sheet, thus avoiding traction forces which result in deformation of the industrial footwear and reduced protection for the foot, and becoming an unwanted risk element, to the contrary of its purpose.
  • One objective of the invention is to start from a last obtained by anthropometric study of the worker wearing the safety and protective footwear, currently being filed for a patent by the same applicant of the present invention, and design, calculate and elaborate a one-piece toe cap to protect the five toes of the foot, defining heights, widths, depths and elements for balanced distribution of impact forces.
  • the toe cap of the present invention has as one of its main characteristics the fact of protecting the five toes.
  • the rim of the toe cap of the present invention has two angles ( ⁇ , ⁇ ), as shown in Fig. 6 and 7 ; the toe caps of the prior art do not include these angles, which has the effect of preventing flexure of the foot while at least partly protecting the five toes.
  • the present toe cap is manufactured from materials not having harmful effects on the health.
  • the toe cap is of a single piece, nonmetallic, although in an alternate modality it can also be manufactured from a metallic material.
  • the toe cap comprises a rim (11) formed by a front wall (5), lateral walls (6, 8) joined toward the upper part by means of a nonplanar portion of the surface (12).
  • the lower part of the toe cap has a flange (13) which is joined to the shoe via the sole (7).
  • the opposite end of the nonplanar surface (12) terminates in the rear wall (14) (see Fig. 6 ).
  • This rim (11) recedes from the front wall (5) toward the rear wall (14), along the internal face of the toe cap, to terminate in the step (18) ( Fig. 8 ) at a distance (x) of typically 0.8 to 1.0 cm.
  • Figures 8 and 10 are transverse and longitudinal section views showing the step (18).
  • the rear wall (14) is a semicylindrical wall generally following the shape of a rounded tip, the rim which joins the lateral walls (6, 8), the rear wall (14) and the upper surface (12) is a rounded rim ( Fig. 3 ).
  • the design of the toe cap of the present invention forms a framework which, owing to its disposition in space and the development of the angles, is extraordinarily rigid and resistant to impacts. Thanks to the design of the toe cap, the elements (4, 6, 8 and 11) and the flange (13) and its ends terminating in a point conduct the force of the impact over the walls and to the sole, preventing the toes from being exposed to the impact. In addition, the flange (13) prevents the penetrating action to the contact surface of toe cap/sole, reducing the risk to the 5 toes of the user of the safety and protection footwear. It also prevents movement of the toe cap at the moment of sustaining an impact or a compression with a force as defined in the aforementioned ranges ( Fig. 3 and 5 ).
  • the design of the protective toe cap bases the definition of its dimensions on the last corresponding to the size of the footwear. It is not a universal toe cap in the sense of not changing its dimensions with the footwear, but rather its dimensions are modified in accordance with the size of the footwear to which it will be adapted, which is not the case with the toe caps of the prior art.
  • recio Ribo " (R), width of the foot (AP), instep circumference (CE), heel width (T), instep length (LE), dimensions of the toes, fibular length of instep (LFEm), height of "recio” (AR) (Height of the circumference of the ball of the foot), instep height (AE), big toe angle ( ⁇ g), little toe angle ( ⁇ m), length of foot (LP), instep length (LE), length of foot at 16% (LP16), length of foot at 50% (LP50), a certain tolerance, metatarsal width and length, plantar length and width, tip height, heel width (AT), circumference of the toe area (CAD), heel bulb width, etc.
  • Additional considerations for the design of the last in the area of the tip that will define the design of the toe cap are: the anatomical distribution of the heads of the metatarsals, the inclusion of the 5 toes, the displacement of the foot while walking, the foot flexure zone.
  • the values obtained in the anthropometric study sample determined the dimensions applied specifically to the tip of the last so that the design of the toe cap will use the dimensions of same as its base.
  • An additional protective space has been added to the last along the length and height in order to provide freedom of movement to the toes and create a grace space in the event of a compression or impact accident to which the toes may be subjected, this consideration being 3 to 7 mm in addition.
  • the information obtained from the population evaluated by the three-dimensional measurement system using INFOOT is subjected to statistical analysis to determine the trends of the measurements and obtain the most representative ones for the population segments studied.
  • a first abstraction of the toe cap is performed, obtaining an image which replicates an exact image of the tip of the last with the dimensions of the desired depth.
  • the width, height and depth as defined on the last one determines the additional advantages required to integrate in the design the dimensions and thickness of the sole, tab, and lining.
  • the types of support base are:
  • the toe cap support base selected for the present invention is that with a complete flange (13).
  • K T / 3 + 5 mm + 10 mm
  • K is a constant that defines the point coinciding with the central line of the last (10) and with the central line of the curvature of the toe cap.
  • a - P3 is defined as the distance A - P3 (see Fig. 1A ), which is equal to 1/3 of T + 5 mm + 10 mm.
  • T is the width of the heel.
  • P1 is defined as the point on the curve of the toe cap closest to the line of descent on the last on the lateral wall to the first digit (big toe).
  • P2 is defined as the maximum point of curvature most pronounced toward the curvature of the last.
  • P3 is the distance at which the curvature of the toe cap coincides with the central axis of the last.
  • P4 is the point closest to the line of descent to the zone of the 5th digit (little toe) or external line of the last.
  • Zone D is the curvature over the last of the toe cap and the height is to be considered at the highest point.
  • R maximum height of the last in zone "D” (not considering the camber)
  • Z maximum width of the last in the plantar base of the zone "D”
  • E ⁇ 2 Z + 2 E ⁇ 5 + 2 E ⁇ 4 ⁇ not considering the camber of the last .
  • E ⁇ 9 R + E ⁇ 7 + 2 E ⁇ 5 + 2 E ⁇ 4 ⁇ not considering the camber of the last .
  • Fig. 4 one finds how to locate the lower line of the region D-D', it is a region which defines a curvature symmetrical to the curvature of the metatarsal heads of the toes, a point at which intersect the central line of the last with the form of the curvature, designated as K or P3, two points known as P1 and P4 that define the points on the curve D closest to the lateral walls of the last in the zone of the first and fifth metatarsal, lines running toward the lower part on the edge of the sole known as P and C, the joining of these two points P and C by a junction line determines the length of the last to calculate that of the toe cap.
  • the next step is to determine the line of the axis of the last, for which one traces a point tangential to the heel of the last (TT) and also traces a point tangential to the tip of the last (PT), a junction line is drawn between TT and PT ( Fig. 4 ), which determines the line of the axis of the last in combination with the line of width of the toe cap one can determine the external (PE), central (PC) and internal (PI) depths (as shown in Fig. 4 ).
  • PE external
  • PC central
  • PI internal
  • this line PC is divided by 4 to obtain the points of reference for measurement of the external depth of the last for the toe cap, the central depth of the last for the toe cap and the internal depth of the last for the toe cap, said points being known as X1, X2 and X3, see Fig. 4 .
  • the depths of the toe cap are determined by the following formulas:
  • point B is determined, 5 mm are added to the central axis line (10), Fig. 1A and 4 .
  • the criterion of the 5 mm added has been determined as the result of the location of the flexure zone of the foot, translated to the last. This determines the point C, where is located the line of flexure of the toes, translated to the last ( Fig. 2A and 2B ).
  • a tab which is a strip of synthetic material consisting of two parts, one being inserted inside the edge or mouth of the toe cap and having a small step of 1 mm thickness and a width of 10 mm; toward the outer part of the strip it has a measurement of 10 mm and in total the tab strip has a width of 20 mm.
  • the tab element has a dimension of 8 to 10 mm (x).
  • the distance to be added in the central axis line (10) after the point (C) is equal to the outer width, that is, the distance of (C) (all those of Fig. 2A and 2B ), to this is added 8 to 10 mm and it gives us the point P3 of the curve (D) ( Fig. 1A ).
  • Figure 6 shows the angle ⁇ which defines the angle between the maximum height point of the region "D" and the line of support of the flange, said angle corresponds to 20 degrees, this enables an additional stability of the toe cap, giving it antiroll properties and greater dispersion of forces in the impact and compression tests.
  • Fig. 7 one observes the angle ⁇ , which is formed with respect to a straight line from the inside width points of the toe cap between the inside and outside point equivalent to 5 degrees as the resultant of the coverage for the 1st and 5th digits, which provides a larger coverage for the fifth digit.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
EP08766689.7A 2007-12-05 2008-06-13 Embout de protection pour chaussure industrielle Not-in-force EP2223621B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MX2007015351A MX2007015351A (es) 2007-12-05 2007-12-05 Casco de proteccion para calzado industrial.
PCT/MX2008/000074 WO2009072857A1 (fr) 2007-12-05 2008-06-13 Embout de protection pour chaussure industrielle

Publications (3)

Publication Number Publication Date
EP2223621A1 true EP2223621A1 (fr) 2010-09-01
EP2223621A4 EP2223621A4 (fr) 2011-08-17
EP2223621B1 EP2223621B1 (fr) 2015-01-07

Family

ID=40717919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08766689.7A Not-in-force EP2223621B1 (fr) 2007-12-05 2008-06-13 Embout de protection pour chaussure industrielle

Country Status (7)

Country Link
US (2) US20100236105A1 (fr)
EP (1) EP2223621B1 (fr)
CA (1) CA2707574C (fr)
CO (1) CO6280392A2 (fr)
ES (1) ES2535008T3 (fr)
MX (1) MX2007015351A (fr)
WO (1) WO2009072857A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9070160B2 (en) 2011-12-15 2015-06-30 Nike, Inc. Customized design for an article of footwear
US9009614B2 (en) 2011-12-15 2015-04-14 Nike, Inc. Customized article type
WO2014007818A1 (fr) * 2012-07-05 2014-01-09 Honeywell International Inc. Bout rapporté protecteur injecté
US10045592B2 (en) 2013-08-07 2018-08-14 Protectozz, Llc Toe protector for athletic footwear having removable cleats
USD770149S1 (en) 2014-08-05 2016-11-01 Protectozz, Llc Toe protector for athletic footwear having removable cleats
US11266205B2 (en) * 2018-03-15 2022-03-08 Shoe-Vital LLC Wearable shoe shaper
KR101973769B1 (ko) * 2018-11-21 2019-09-02 신재웅 토우캡
KR102121765B1 (ko) * 2019-02-27 2020-06-11 이호영 임업용 장화
CN114479239B (zh) * 2022-01-24 2023-03-03 东莞华和复合材料科技有限公司 一种应用于鞋头生产的纳米复合材料及其制备方法
WO2023238969A1 (fr) * 2022-06-10 2023-12-14 신재웅 Chaussures de sécurité

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JPS59162003U (ja) * 1983-04-14 1984-10-30 太平洋工業株式会社 複合強化樹脂製安全靴先芯

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GB657858A (en) * 1948-11-04 1951-09-26 Raymond Bernard Harrison Improvements in safety shoes
DE1154016B (de) * 1959-10-30 1963-09-05 Schabsky Atlas Schuhfab Sicherheitsschuh
JPS59162003U (ja) * 1983-04-14 1984-10-30 太平洋工業株式会社 複合強化樹脂製安全靴先芯

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Title
See also references of WO2009072857A1 *

Also Published As

Publication number Publication date
WO2009072857A1 (fr) 2009-06-11
CA2707574C (fr) 2016-08-16
CO6280392A2 (es) 2011-05-20
US20100236105A1 (en) 2010-09-23
MX2007015351A (es) 2008-09-18
EP2223621A4 (fr) 2011-08-17
EP2223621B1 (fr) 2015-01-07
CA2707574A1 (fr) 2009-06-11
US10045586B2 (en) 2018-08-14
ES2535008T3 (es) 2015-05-04
US20140115795A1 (en) 2014-05-01

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